The ornamental design for a handle, as shown and described.
FIG. 1 is an isometric view of a handle incorporating our new design, wherein the portions illustrated in dotted lines form no part of the claimed design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a right side elevation view thereof, the left side elevation view being a mirror image thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The broken lines depict portions of the handle in which the design is embodied that form no part of the claimed design.